Michael Cahn, Irrigation and Water Resource Advisor . Irrigation water with a high EC will tend to infiltrate faster than water with a low EC. Salts reduce the osmotic potential of water, increasing the energy that plants use to extract moisture from soil, and making them more susceptible to wilting. Monterey County UCCE .

The FAO article presents the ranges of SAR and EC values that will reduce infiltration. In the Southwest, the first scenario prevails, as irrigation water in this region contains appreciable amounts of salts, typically 500 to 1,500 ppm.

You don't need to get the salt completely out of the soil, but it must soak deep enough in the soil to fall below the root zone of the plants you want in the area. Are there salt constituents that would lead to the clogging of drip emitters or micro-sprinklers?

Dissolved salts in irrigation water present numerous challenges to growers.

Evaluating Salinity in Irrigation Water .

Scientists discover a game-changing way to remove salt from water.

Yes, just search on “desalinization”. It also makes the soil more permeable and able to retain moisture longer.

In addition to contributing to water stress, some constituents of salts such as sodium, chloride, and boron are toxic if they accumulate in the leaves or other tissues.

Therefore, root-induced salt problems should, in theory, only occur in situations where dissolved salt from irrigation water accumulates or in soil that is inherently saline. Some thing those people that have nothing to drink but sea water have to go through. In most areas of Western Australia, about three-quarters of the total soluble salt is sodium chloride, though this may vary in coastal and pastoral areas.

Reverse osmosis: In a reverse osmosis filtration system, water flows through a membrane, filtering out some of the molecules within the water, including sodium and chloride. If chloride salt is a problem, select a soybean variety that is a chloride excluder. Water salinity is a measure of the total dissolved salts. Researchers breed and screen soybean varieties to determine which ones can exclude chloride from entering the plant.

For example, in irrigation water at Carnarvon, only about half the total soluble salt is sodium chloride. While it is effective, there are some hazardous chemicals required in running the system. • A primary cause of water salinity is excess sodium (Na). Salts reduce the osmotic potential of water, increasing the energy plants need for extracting moisture from soil, and making them more susceptible to wilting. Irrigation water that has high chloride salt levels can damage crops. Water the area with a sprinkler every few days -- at least once a week -- for an hour or longer using salt-free water to leach the salt out of the top layers of soil. The total amount of water to be applied is AW = ET/ (1-LR) Salts in irrigation water are mainly common salt (sodium chloride), calcium and magnesium bicarbonates, chlorides and sulphates.

The technology could have massive implications for the future of our drinking water.

Deionization: Similar to a water softener, in a deionization system water, is filtered through a resin, but acids and bases are used rather than salt to regenerate the system. Saline water poses several hazards: • As the salinity of the soil is increased by the use of water containing appreciable soluble salts, plants have increasing difficulty absorbing water.

A general equation to calculate the leaching requirement is LR (%) =ECiw/ (5ECth-ECiw) Where ECiw is the EC of the irrigation water, and ECth is the threshold salinity measured in the saturated soil extract, above which yield begins do decline (both in ds/m). Without Care Free the wetted area measured 26 3/4"-more than half the water & fertilizers were wasted

Because Care Free reduces the micron size of salt particles in the water & makes them inert, the water penetrates the soil faster. I believe it is really difficult to reduce salinity in water, the only way to get irrigation water is to recycle water, dilute with groundwater or rain water.

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